CN103867168A - Multi-branch small horizontal well oil production method - Google Patents
Multi-branch small horizontal well oil production method Download PDFInfo
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- CN103867168A CN103867168A CN201410117388.3A CN201410117388A CN103867168A CN 103867168 A CN103867168 A CN 103867168A CN 201410117388 A CN201410117388 A CN 201410117388A CN 103867168 A CN103867168 A CN 103867168A
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Abstract
The invention relates to the field of petroleum, in particular to a multi-branch small horizontal well oil production method. The reasons of fast production decline and easy water appearing of a horizontal well are that the diameter phi of a long horizontal-segment well is large and is 139 mm, and stratum energy is fast declined gradually. According to the optimization design technology of a multi-branch small horizontal well, the diameter phi of an open-hole completion branch is small and is 30-50 mm, the stratum energy has a circulation process of existence, recovery and release, and the declining rate is low. An encryption adjusting well can be replaced, investment is little, effects are better, and the purpose of digging few wells with high quality is achieved. Investment cost of the method is only 1/10 that of a horizontal well technology, with oil layers of the same physical property, the yield after the method is carried out is 1/3-1/2 that of the horizontal well. Multiple horizontal branches can be drilled in one oil layer in the range of 360 degrees. According to the multi-branch small horizontal well oil production method, multi-layer mining can be performed on the same oil well, and the optimization design technology of the multi-branch small horizontal well is suitable for oil layers with the effective thickness larger than 2 m.
Description
Technical field
The present invention relates to oil field, relate in particular to multiple-limb miniature water horizontal well produce oil method.
Background technology
Background technology of the present invention is horizontal well drilling technology.Horizontal well is that maximum hole deviation remains on 90 ° of left and right, and in target zone, maintains the exceptional well of the net horizontal section of certain length.The shortcoming of horizontal well technology is that individual well cost of investment is huge, can only creep into towards a direction, can not carry out multiple-zone production for same a bite oil well, the economic benefit of not implementing for oil sheet, and horizontal well production is successively decreased soon, easy water breakthrough.
Summary of the invention
The object of invention: for a kind of powerful multiple-limb miniature water horizontal well produce oil method is provided, specific purposes are shown in multiple essence technique effects of concrete implementation section.
In order to reach as above object, the present invention takes following technical scheme:
Multiple-limb miniature water horizontal well produce oil method, it is characterized in that, comprise following steps, for same oil well or well site, on the horizontal plane on oil reservoir top, within the scope of 360 °, creep into multiple 100ms with interior, diameter 30-50mm horizontal bare hole well section towards different directions in the mode of angle >=15 °, well section connects oil well or well site, forms and three-dimensionally descends well pattern.
The further technical scheme of the present invention is, described horizontal plane comprises one, and is positioned at the different degree of depth of oil reservoir bottom, spacing 30-50cm.
The further technical scheme of the present invention is, described multiple horizontal bare hole well sections distribute with different angles.
The further technical scheme of the present invention is, horizontal bare hole well Duan Weiwei straight section form or segmental arc form in described same level.
Adopt as above the present invention of technical scheme, there is following beneficial effect with respect to prior art: technique of the present invention is simple, barefoot completion, cost of investment is only equivalent to horizontal well technology 1/10, the oil reservoir of identical physical property, and the output after the invention process is equivalent to 1/3-1/2 of horizontal well.The present invention can creep into multiple horizontal branch within the scope of 360 °, an oil reservoir.The present invention can carry out multiple-zone production to same a bite oil well.As long as being greater than the oil reservoir of 2m, effective pay thickiness is all suitable for multiple-limb miniature water horizontal well design optimizing, applied widely.Horizontal well production is successively decreased soon, easily the reason of water breakthrough is that stratum energy successively decreases rapidly compared with the horizontal segment well diameter of growing large (Φ 139mm); Multiple-limb miniature water horizontal well design optimizing barefoot completion branch's diameter little (Φ 30-50mm), stratum energy has the cyclic process of a survival, recovery, release, and lapse rate is low.The present invention can replace encrypted adjustment well, invests littlely, and better effects if, reaches the target of " few well-digging ", " accomplishing fluently well ".
Brief description of the drawings
In order to further illustrate the present invention, further describe below in conjunction with accompanying drawing:
Fig. 1 is multiple-limb miniature water horizontal well schematic diagram;
Fig. 2 is multiple-limb miniature water horizontal well cross-section illustration intention;
Fig. 3 is the underground well pattern schematic diagram of multiple-limb miniature water horizontal well.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described, embodiment is not construed as limiting the invention:
Technical scheme of the present invention has two kinds:
One, for a bite oil well, at the different degree of depth in oil reservoir top (spacing 30-50cm), within the scope of 360 °, creeps into multiple 100ms with interior, diameter 30-50mm horizontal bare hole well section towards different directions with different angle (>=15 °).(seeing accompanying drawing 1, accompanying drawing 2) its two, for a well site, carry out comprehensive cloth hole by above method, oil reservoir form a three-dimensional underground well pattern.(seeing accompanying drawing 3) above-mentioned two schemes, can be used as the new technology that a kind of old well is taped the latent power, and also can be used as effectively supplementing of Productivity Construction.
Core of the present invention is how to carry out differentiation design for different physical property oil reservoirs.Other embodiment shell perforation of the present invention, can only form the aperture of multiple diameter≤8mm, length≤2m.Pressure break, different pressure break scales forms the crack of 30m left and right at random, and the direction of reservoir stress direction and heterogeneous body hole is depended in crack, and the length direction in crack is all uncontrollable.
Effective control area that the present invention can set up individual well reaches 3.14 ten thousand m
2, can accurately control and creep into length and direction, can form 360 ° three-dimensionally descend well pattern.Investment of the present invention only has 1/10 of background technology.Oil well productivity of the present invention can reach 1/3-1/2 of background technology.
More than show and described general principle of the present invention, principal character and advantage of the present invention.Those skilled in the art should understand the present invention and not be restricted to the described embodiments; that in above-described embodiment and manual, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (4)
1. multiple-limb miniature water horizontal well produce oil method, it is characterized in that, comprise following steps, for same oil well or well site, on the horizontal plane on oil reservoir top, within the scope of 360 °, creep into multiple 100ms with interior, diameter 30-50mm horizontal bare hole well section towards different directions in the mode of angle >=15 °, well section connects oil well or well site, forms and three-dimensionally descends well pattern.
2. multiple-limb miniature water horizontal well produce oil method as claimed in claim 1, is characterized in that, described horizontal plane comprises one, and is positioned at the different degree of depth of oil reservoir bottom, spacing 30-50cm.
3. multiple-limb miniature water horizontal well produce oil method as claimed in claim 1, is characterized in that, described multiple horizontal bare hole well sections distribute with different angles.
4. multiple-limb miniature water horizontal well produce oil method as claimed in claim 1, is characterized in that horizontal bare hole well Duan Weiwei straight section form or segmental arc form in described same level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117388.3A CN103867168A (en) | 2014-03-27 | 2014-03-27 | Multi-branch small horizontal well oil production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117388.3A CN103867168A (en) | 2014-03-27 | 2014-03-27 | Multi-branch small horizontal well oil production method |
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| CN103867168A true CN103867168A (en) | 2014-06-18 |
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| CN201410117388.3A Pending CN103867168A (en) | 2014-03-27 | 2014-03-27 | Multi-branch small horizontal well oil production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047587A (en) * | 2014-07-07 | 2014-09-17 | 西安三才石油工程服务有限公司 | Method for multi-direction deep acidification of oil layer |
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| CN103422812A (en) * | 2013-08-02 | 2013-12-04 | 奥瑞安能源国际有限公司 | Single-well coal bed gas multi-branch horizontal well drilling and completion method |
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2014
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Patent Citations (6)
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| CA2253574C (en) * | 1996-05-01 | 2006-07-18 | Baker Hughes Incorporated | Multi-lateral wellbore systems and methods for forming same |
| CN1729343A (en) * | 2000-03-17 | 2006-02-01 | 马拉索恩石油公司 | Template and system of templates for drilling and completing offset well bores |
| US7299878B2 (en) * | 2003-09-24 | 2007-11-27 | Halliburton Energy Services, Inc. | High pressure multiple branch wellbore junction |
| CN101539008A (en) * | 2009-04-14 | 2009-09-23 | 赵万福 | Ground stereoscopic discharge and mining method of coal bed methane |
| CN103422812A (en) * | 2013-08-02 | 2013-12-04 | 奥瑞安能源国际有限公司 | Single-well coal bed gas multi-branch horizontal well drilling and completion method |
| CN103410480A (en) * | 2013-08-20 | 2013-11-27 | 东营柏盛德石油科技有限公司 | Unit type four-side continuous seamlessly-sectionalized radial multiple-branch three-dimensional injection-production development technology |
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| CN104047587A (en) * | 2014-07-07 | 2014-09-17 | 西安三才石油工程服务有限公司 | Method for multi-direction deep acidification of oil layer |
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Application publication date: 20140618 |
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